Battery charger



FIG. 1 is a front perspective view of a battery charger according to the present invention;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a back view thereof.

The broken lines in the drawings are for the purpose of illustrating unclaimed portions of the battery charger and form no part of the claimed design. 

CLAIM The ornamental design for a battery charger, as shown and described. 